2.x

.github/workflows/build-and-test.yml

@@ -1,43 +1,68 @@
 name: Build and Test
-
 # The event triggers are configured as following:
-# - on `main` -> trigger the workflow on every push
+# - on `2.x` -> trigger the workflow on every push
 # - on any pull request -> trigger the workflow
 # This is to avoid running the workflow twice on pull requests.
 on:
   push:
     branches:
-      - main
+      - 2.x
   pull_request:
 
+permissions:
+  contents: read
+
 jobs:
   install:
     runs-on: ubuntu-latest
-
+    permissions:
+      contents: read
     strategy:
       matrix:
-        node-version: [14.x, 16.x, 17.x, 18.x]
-
+        node-version: [16.x, 17.x, 18.x, 19.x, 20.x, 21.x]
     steps:
+      - name: Harden the runner (Audit all outbound calls)
+        uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
+        with:
+          egress-policy: audit
       - name: Checkout
-        uses: actions/checkout@v3
+        uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+        with:
+          persist-credentials: false
       - name: Setup Node.js ${{ matrix.node-version }}
-        uses: actions/setup-node@v3
+        uses: actions/setup-node@820762786026740c76f36085b0efc47a31fe5020 # v7.0.0
         with:
           node-version: ${{ matrix.node-version }}
           cache: 'npm'
+      - name: Install xvfb
+        # Inline replacement for GabrielBB/xvfb-action (unmaintained since 2022).
+        # The action did the same thing this two-line install does, plus a
+        # JavaScript wrapper around xvfb-run. Inlining removes a third-party
+        # action dependency from the CI supply chain.
+        run: sudo apt-get update && sudo apt-get install -y xvfb
       - name: Install Dependencies
-        run: npm ci
+        # --ignore-scripts skips preinstall/install/postinstall scripts from
+        # all packages. Reduces the attack surface for malicious npm deps
+        # that try to read secrets from the runner env during install.
+        # Matches the pattern used by main's slsa-provenance.yml.
+        run: npm ci --ignore-scripts
       - name: Build
         run: npm run build
       - name: Lint
         run: npm run lint
       - name: Test
-        uses: GabrielBB/xvfb-action@v1.6
-        with:
-          run: npm run test:ci
+        # xvfb-run -a allocates a fresh display number, runs the command
+        # against it, and tears down. Functionally equivalent to what the
+        # old xvfb-action did, but without the third-party action.
+        run: xvfb-run -a npm run test:ci
         env:
-          TEST_BROWSERSTACK: ${{ startsWith(matrix.node-version, '18') }}
-          TEST_PROBE_ONLY: ${{ github.ref != 'refs/heads/main' }}
-          BS_USERNAME: ${{ secrets.BS_USERNAME }}
-          BS_ACCESSKEY: ${{ secrets.BS_ACCESSKEY }}
+          TEST_BROWSERSTACK: ${{ startsWith(matrix.node-version, '21') }}
+          TEST_PROBE_ONLY: ${{ github.ref != 'refs/heads/2.x' }}
+          # BrowserStack credentials are injected ONLY for the Node 21 matrix
+          # entry, which is the only entry where TEST_BROWSERSTACK is true.
+          # For other matrix entries the values resolve to empty strings,
+          # so a malicious dependency installed during Node 16-20 jobs
+          # cannot read BrowserStack credentials from env even if the
+          # --ignore-scripts defense above fails for some reason.
+          BS_USERNAME: ${{ startsWith(matrix.node-version, '21') && secrets.BS_USERNAME || '' }}
+          BS_ACCESSKEY: ${{ startsWith(matrix.node-version, '21') && secrets.BS_ACCESSKEY || '' }}

.github/workflows/codeql-analysis.yml

@@ -1,19 +1,29 @@
 name: "CodeQL"
 
+# Branches set to 2.x because this copy of the workflow lives on the 2.x
+# branch. For pull_request events, GitHub runs the workflow file from the
+# PR's BASE branch, so the branches filter here only needs to match events
+# that actually fire on 2.x — not the main/3.x copies, which carry their
+# own filters.
 on:
   push:
-    branches: [main]
+    branches: [2.x]
   pull_request:
-    # The branches below must be a subset of the branches above
-    branches: [main]
+    branches: [2.x]
   schedule:
     - cron: '0 19 * * 4'
 
+permissions:
+  contents: read
+
 jobs:
   analyze:
+    permissions:
+      actions: read          # for github/codeql-action/init to get workflow details
+      contents: read         # for actions/checkout to fetch code
+      security-events: write # for codeql-action to upload SARIF results
     name: Analyze
     runs-on: ubuntu-latest
-
     strategy:
       fail-fast: false
       matrix:
@@ -24,28 +34,32 @@ jobs:
         # https://docs.github.com/en/github/finding-security-vulnerabilities-and-errors-in-your-code/configuring-code-scanning#overriding-automatic-language-detection
 
     steps:
-    - name: Checkout repository
-      uses: actions/checkout@v3
+    - name: Harden the runner (Audit all outbound calls)
+      uses: step-security/harden-runner@bf7454d06d71f1098171f2acdf0cd4708d7b5920 # v2.20.0
       with:
-        # We must fetch at least the immediate parents so that if this is
-        # a pull request then we can checkout the head.
-        fetch-depth: 2
+        egress-policy: audit
 
-    # If this run was triggered by a pull request event, then checkout
-    # the head of the pull request instead of the merge commit.
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
+    - name: Checkout repository
+      uses: actions/checkout@3d3c42e5aac5ba805825da76410c181273ba90b1 # v7.0.1
+      with:
+        persist-credentials: false
+        # The legacy `git checkout HEAD^2` step that used to follow this
+        # checkout has been removed: it presumes a merge commit with two
+        # parents, but the repo's ruleset enforces linear history (squash
+        # merges only), so PR heads are single-parent commits and HEAD^2
+        # is not a valid ref. Modern codeql-action handles PR head
+        # checkout internally; the explicit step is unnecessary.
 
     # Initializes the CodeQL tools for scanning.
     - name: Initialize CodeQL
-      uses: github/codeql-action/init@v2
+      uses: github/codeql-action/init@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v4.37.3
       with:
          languages: ${{ matrix.language }}
 
-    # Autobuild attempts to build any compiled languages  (C/C++, C#, or Java).
+    # Autobuild attempts to build any compiled languages (C/C++, C#, or Java).
     # If this step fails, then you should remove it and run the build manually (see below)
     - name: Autobuild
-      uses: github/codeql-action/autobuild@v2
+      uses: github/codeql-action/autobuild@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v4.37.3
 
     # ℹ️ Command-line programs to run using the OS shell.
     # 📚 https://git.io/JvXDl
@@ -59,4 +73,4 @@ jobs:
     #   make release
 
     - name: Perform CodeQL Analysis
-      uses: github/codeql-action/analyze@v2
+      uses: github/codeql-action/analyze@e4fba868fa4b1b91e1fdab776edc8cfbe6e9fb81 # v4.37.3

LICENSE

@@ -1,5 +1,5 @@
 DOMPurify
-Copyright 2015 Mario Heiderich
+Copyright 2025 Dr.-Ing. Mario Heiderich, Cure53
 
 DOMPurify is free software; you can redistribute it and/or modify it under the
 terms of either:
@@ -9,17 +9,207 @@ b) the Mozilla Public License Version 2.0
 
 -----------------------------------------------------------------------------
 
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-    http://www.apache.org/licenses/LICENSE-2.0
-
-    Unless required by applicable law or agreed to in writing, software
-    distributed under the License is distributed on an "AS IS" BASIS,
-    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-    See the License for the specific language governing permissions and
-    limitations under the License.
+                                 Apache License
+                           Version 2.0, January 2004
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+
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 -----------------------------------------------------------------------------
 Mozilla Public License, version 2.0